Systems & Rust
Millions of Concurrent Connections: A Zero-Copy Async Network Engine in Rust and io_uring
A close look at why the classic epoll reactor drowns in syscalls and memory copies at a million QPS, followed by a hands-on walkthrough of building a lock-free, zero-copy network engine in Rust on Linux io_uring that sustains 4.5M requests per second on a single core.
#Concurrency
#io_uring
#Linux Kernel
iouring_zero_copy_engine.rsrust
use io_uring::{opcode, types, IoUring};
use std::os::unix::io::RawFd;
pub struct ZeroCopyServer {
ring: IoUring,
socket_fd: RawFd,
}
impl ZeroCopyServer {
pub fn new(fd: RawFd, queue_depth: u32) -> std::io::Result<Self> {
let ring = IoUring::builder()
.setup_sqpoll(2000) // Enable the kernel SQPOLL thread with a 2ms idle timeout
.setup_coop_taskrun()
Lucas Richter
2025-02-10